Rotary rock-drill with hydraulic feed



2 Sheets-Sheet 1.

(No Model.) Y A. E. W. MEISSNER.

ROTARY ROCK DRILL WITH. HYDRAULIC FEED.

Patented Apr. 7,v 1896 n A v Arr DREW B GRAHAM. PMUTOUNQWALMNGTDN. D1:A

2 sheetssheet 2.

(No Model.)

A. E. W. MEISSNER. ROTARY ROCK DRILL WITH HYDRAULIC FELD.v No. 557,686.Patented Apr. 7, 1896.

Zrz: Y qb ve/Zinn' NiTn STATES ADOLE EMIL IVALDEMAR MEISSNER ASSIGNOR TOTHE SIEMENS ATENT Clarion.

AMERICA, OF CHICAGO, ILLINOIS.

ROTARY ROCK-DRILL WITH HYDRAULIC FEED.

SPECIFICATION forming part of Letters Patent No. 557,686, dated April 7,1896.

Application tiled February l, 1896. Serial No, 577,702. (No model.)

To all whom it may concern:

Be it known that I, ADCLF EMIL XVALDE- MAR MEISSNER, a subject of theEmperor of Germany, residing at Charlottenburg, nea-r Berlin, Germany,have invented new and useful Improvementsin Rotary Rock-Drills withHydraulic Feed, (Oase No. 53,) of which the following is aspecification.

My invention relates to a rotary rock-drill with hydraulic feed, theobject of my invention being to provide an improved construction ofrotary drill, whereby dydraulic pressure may be employed for effectingthe forward feed of the drill and also for retracting the drill.

It has been the practice, in the employment of rotary drills, to conductwater to the drillpoint for facilitating the drilling operation, andwhere this is done a water-pressure exists which may be utilized forproducing the feed of the drill. It is often necessary to employconsiderable force in retracting the drill, as, for instance, in theemployment of the diamond prospecting-drill, when it is necessary to useconsiderable retracting force to break olf the core. By means ofhydraulic pressure the necessary force required for retracting the drillmay be provided, and it is therefore desirable so to construct the drillthat hydraulic pressure may be utilized both for feeding and forretracting the drill.

In accordance with the present invention, the drill is constructed sothat the hydraulic pressure may be employed for advancing the drillduring the drilling opera-tion to thus effect the feed, and may also beemployed for retracting the drill. In the construction of the drillemployed in practice, a pipe or cylinder is employed, which is rotatedthrough suitable driving mechanism. Moving within the driving-pipe androtating therewith is a pipe or cylinder upon the end of which the drillis mounted. IVithin the drill pipe or cylinder is provided a piston,mounted stationarily and connected, through ducts or channels extendingto the rear of the drill, with a water-supply, whereby water may beadmitted to the interior of the drill cylinder or pipe upon one side orthe other of the stationary pistonV The stationary piston thus serves asan abutment upon which the water may react in moving the drill-pipe inone direction or the other, according as the water is admitted upon oneside or the other of the piston.

The mechanical construction of the drill which I employ in practice isillustrated in the accompanying drawings, in which- Figure lis alongitudinal sectional view through the drill, and Fig. 2 is a view ofthe drill from beneath.

Like letters refer to like parts in the two figures.

The casing a of the drill is surrounded by a ring a', within which thecasing may rotate, the ring d being suitably mounted upon standards. Aring a2 is adapted to be screwed to the Casin g to maintain thesupporting-ring a against longitudinal displacement. A screw ai isprovided for clamping the casing a in any adjusted position within thesupporting-rin g a. Mounted in a bearing, supported upon the casing, isa beveled gear-wheel Z), the shaft h of which is adapted to be connectedwith a flexible shaft for transmitting a rotary motion to thegear-wheel.

The gear-wheel b meshes with a beveled gear-wheel c, provided upon itsface with a block c carrying an annular channel, between the walls ofwhich and the walls of an annular channel provided in the block C2,balls c3 c3 are provided. The plate c2 is mounted upon the casting d,which is secured to the rear of the casing a. To the hub of thegear-wheel c the rotating pipe or cylinder c is secured by screw e'. Thepipe e carries at its forward end a sleeve e2, between which and a capCL4, secured to the end of the casing a., balls e3 e3 e4 e4 are provided, the balls being adapted to take up the longitudinal thrust of thepipe e.

Within the rotating pipe e is provided a pipe f, upon the end of whichthe drill is adapted to be mounted. The pipe f is capable oflongitudinal movement within the pipe e and carries a projection fadapted to move within a slot e in the pipe e, whereby the drill-pipe fis caused to rotate with the rotating pipe e, while the longitudinalmovement of the drill-pipe is permitted. The forward IOO end of thedrill-pipe f is adapted to move within the sleeve e2, while the rear endcarries a piston f2, which slides upon the exterior of the feed-pipe g,which extends through the interior of the drill-pipe f and carries atits end a piston g/ which closely its within the pipe f. The feed-pipe grotates with the pipe e and is connected to the hub of the gearwheel cby a screw g2. The pipe gis provided with a bore g3, which extendsthrough the interior thereof from end to end, the bore communicating atthe rear end with chamber h, into which water is admitted when thecheckvalve is in one position, water being thus permitted to passthrough the bore g3 and to impinge against a disk f4, provided withinthe pipe f. Then the water is thus admitted, the pipe f is thrustforward to advance the drill. A small hole or opening f5 is provided inthe disk f4 to permit the passage of a small quantity of water to thedrill-point to facilitate the drilling operation. The feed-pipe g isalso provided with a duct g4, which is annular in form and communicatesat the rear end, through openings g5,with a chamber h', to which thewater is admitted when the checkvalve occupies the proper position. Theduct grl communicates at the forward end, through openings g, with theinterior of the pipe f at the rear of the piston g. -Water may thus beadmitted from the chamber 7L through the duct g'l to the interior of thepipe f at the rear of the piston g', thus retracting the drillpipe f.

To prevent the passage of the water past the pistons, packings g2 and f3are provided in connection with the pistons g and f2, respectively.Likewise to prevent the passage of the water between the pipe g and itsbearings at the rear of the drill, stuffing-boxes 7o 71;/ are provided.The cap of the stuffingbox 7o is accessible by the removal of the coverCZ upon the rear of the casting d, while the cap 7e3 of the stuffing-box7.o is accessible by the removal of the casting d from the rear of thecasing a. Tater leaking through the stuffing-box 7a passes to thechambers h or h', and thus does not iind access to the working parts ofthe drill. lVa-ter leaking through the stuffing-box 7U' passes to thespace d3. I To prevent water which may leal; past the piston f2 fromgaining access to the working parts, the slot e5 is sealed from theoutside by a plate e6, so that any water that passes the piston f2 willrun forward and pass to the eX- terior of the drill between the pipefand the sleeve e2, the water being thrown from the machine by means ofthe protecting-disk Z, which also throws o such water as may come backout of the bore-hole.

During the operation of the drill the three pipes e, f, and g rotatetogether and during the feeding of the drill the check-valve 'm occupiesthe position indicated in the figure,

whereby water is admitted through the inner doors of the pipe g to thespace in front of the piston g', a pressure being thus exerted upon thedisk f4, which effects the forward feeding movement of the drill. Thenit is desired to retract the drill, the va-lve m is moved into positionto disconnect the chamber h from the water-supply and connect the samewith thc outlet m', whereby he water from the chamber h may escape.rl`he chamber h is at the same time connected with the water-supply andwater is admitted through the duct g to the space at the rear of thepiston g', and the pressure exerted upon the piston f2 forces the pipe fbackward, thus retracting the drill.

Having described my invention, what l claim as new, and desire to secureby Letters Patent, is

l. The combination with a rotating pipe or cylinder, of a drill pipe orcylinder rotating therewith and capable of longitudinal movementtherein, a stationary piston or abutment within said drill-pipe, afeed-pipe having ducts extending to the opposite sides of said abutment;whereby pressure maybe communicated to either side of said abutment toadvance the drill-pipe or to retract the same, substantially asdescribed.

2. The combination with a rotating pipe or cylinder, of a drill-pipeadapted to be rotated thereby and capable of longitudinal movementtherein, a feed-pipe within said drillpipe and carrying upon its forwardend a piston or abutment upon which said drill-pipe is adapted to move,said feed-pipe being provided with a central bore extending to the spacein front of said piston or abutment and with an annular duct surroundingsaid bore and communicating with the space at the rear of said piston orabutment; substantially as described.

3. The combination with the rotating pipe e, of the feed-pipe g situatedtherein and rotating therewith, the piston or abutment g carried uponthe forward end of said feedpipe, said feed-pipe being provided with acentral bore extending to the forward side of said piston and an annularduct communicating with the space to the rear of said piston, thedrill-pipe f carrying the end pieces f2 and f5, the chambers 7L and hcommunicating respectively with the bore of the feed-pipe and theannular duct thereof, and the valve m for placing one or the other ofsaid chambers h 7L in communication with a water-supply; substantiallyas described.

IOC

In testimony whereof I affix my signature V in the presence of twowitnesses.

ADOLF EMIL WALDEMAR MEISSNER.

Vitnesses:

GEORG SY, HERMANN BONNE.

